7-8 Publication: 0028607
TROUBLESHOOTING
7
Wireless pendant Wireless pendant not
functioning
Truck not in WORK mode Enable cab control panel WORK
mode.
Pendant not enabled Enable pendant.
Pendant batteries are
dead
Replace batteries.
Not in vac or dump mode Set MODE rocker switch on control
panel to VAC or DUMP.
Electrical malfunction
(loss of communication)
• Check transmitter/receiver
communication link LED.
• See Table 7-2: Electrical
Troubleshooting.
Wired pendant Wired pendant not
functioning
Pendant plug not fully
engaged in receptacle
• Re-seat pendant plug.
• Plug into alternate receptacle.
Damaged pendant cable Replace wired pendant cable.
Chassis air Low air pressure (never
reaching 100 PSI)
Solenoid valve or
diaphragm valve on filter
stuck open
Clean, repair, or replace as required.
Faulty compressor or
regulator on truck
Repair or replace compressor or
regulator.
Leak in the air lines,
pneumatic valves,
cylinders, or tanks
Locate the leak and repair or replace
as required.
Defective dash air
pressure gauge
Replace dash air pressure gauge.
Table 7-1: Mechanical Troubleshooting (Continued)
Function Symptom Probable Cause Solution
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